CSUN Loc. 493 - Santa Susana Mountains [Llajas Fm] (Eocene to of the United States)

Also known as LACMIP Loc. 16198

Where: Ventura County, California (34.0° N, 118.0° W: paleocoordinates 35.8° N, 102.2° W)

• small collection-level geographic resolution

When: LLajas Formation, Ypresian to Ypresian (56.0 - 41.3 Ma)

• The stewart bed is a 1 m thick sandstone unit in the middle of the LLajas formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; bioturbated sandstone

• The stewart bed is located in a section of transition from shallow-marine to outer slope and shelf facies.
• sandstone.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

Primary reference: R. L. Squires. 1983. New Mollusks from the Lower Middle Eocene Llajas Formation, Southern California. Journal of Paleontology 57(2):354-362 [L. Ivany/E. Kowalski/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8017: authorized by Linda Ivany, entered by Elizabeth Kowalski on 12.06.2000, edited by Linda Ivany and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• New species only.
Bivalvia
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
Gastropoda
 Cephalaspidea - Cylichnidae
"Scaphander (Mirascapha) costatus" = Scaphander costatus
"Scaphander (Mirascapha) costatus" = Scaphander costatus Gabb 1864 snail
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
Pachycrommium clarki Stewart 1927 snail
 Stromboidea - Strombidae
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta White 1889 true conch
 Sorbeoconcha - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
as Turritella andersoni lawsoni
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor Anderson and Hanna 1925 tusk shell
Cephalopoda
 Coleoidea -
Sepiida indet. Zittel 1895 cuttlefish
new species of spirulimorph sepiid
Anthozoa
 Scleractinia - Montlivaltiidae
"? Trochocyathus striatus" = Trochosmilia striata
"? Trochocyathus striatus" = Trochosmilia striata Gabb 1864 stony coral